Key Takeaway
Meta-analysis confirms inverse association between lithium in drinking water and suicide rates across multiple populations.
Summary
This systematic review and meta-analysis examined the relationship between naturally occurring lithium in drinking water and suicide rates.
Key findings:
- Analyzed studies from multiple countries (Japan, Austria, Greece, Texas, England)
- Consistent inverse association between lithium levels and suicide rates
- Effect observed across different populations and methodologies
- Suggests even trace lithium has mood-stabilizing effects
Implications:
- Supports lithium's mood-stabilizing properties at very low doses
- Questions whether supplementation could provide similar benefits
- Raises public health considerations
Clinical significance:
Provides epidemiological support for low-dose lithium's potential mood benefits, though extrapolating to supplementation requires caution.